<template>
  <div style="position: relative" @selectstart.prevent>
    <div class="verify-img-out">
      <div
        class="verify-img-panel"
        :style="{
          width: setSize.imgWidth,
          height: setSize.imgHeight,
          'background-size': `${setSize.imgWidth} ${setSize.imgHeight}`,
          'margin-bottom': `${vSpace}px`
        }">
        <div v-show="showRefresh" class="verify-refresh" style="z-index: 3" @click="refresh">
          <i class="iconfont icon-refresh"></i>
        </div>
        <img
          ref="canvas"
          :src="`data:image/png;base64,${pointBackImgBase}`"
          alt
          style="display: block; width: 100%; height: 100%"
          @click="bindingClick ? canvasClick($event) : undefined" />

        <div
          v-for="(tempPoint, index) in tempPoints"
          :key="index"
          class="point-area"
          :style="{
            'background-color': '#1abd6c',
            color: '#fff',
            'z-index': 9999,
            width: '20px',
            height: '20px',
            'text-align': 'center',
            'line-height': '20px',
            'border-radius': '50%',
            position: 'absolute',
            top: `${parseInt(tempPoint.y - 10)}px`,
            left: `${parseInt(tempPoint.x - 10)}px`
          }">
          {{ index + 1 }}
        </div>
      </div>
    </div>
    <!-- 'height': this.barSize.height, -->
    <div
      class="verify-bar-area"
      :style="{
        width: setSize.imgWidth,
        color: barAreaColor,
        'border-color': barAreaBorderColor,
        'line-height': barSize.height
      }">
      <span class="verify-msg">{{ text }}</span>
    </div>
  </div>
</template>

<script>
  /**
   * VerifyPoints
   * @description 点选
   * */
  import { resetSize } from '../utils/util'
  import { aesEncrypt } from '../utils/ase'
  import { reqCheck, reqGet } from '../api'

  export default {
    name: 'VerifyPoints',
    props: {
      // 弹出式pop，固定fixed
      mode: {
        type: String,
        default: 'fixed'
      },
      captchaType: {
        type: String
      },
      // 间隔
      vSpace: {
        type: Number,
        default: 5
      },
      imgSize: {
        type: Object,
        default() {
          return {
            width: '310px',
            height: '155px'
          }
        }
      },
      barSize: {
        type: Object,
        default() {
          return {
            width: '310px',
            height: '40px'
          }
        }
      }
    },
    data() {
      return {
        secretKey: '', // 后端返回的ase加密秘钥
        checkNum: 3, // 默认需要点击的字数
        fontPos: [], // 选中的坐标信息
        checkPosArr: [], // 用户点击的坐标
        num: 1, // 点击的记数
        pointBackImgBase: '', // 后端获取到的背景图片
        poinTextList: [], // 后端返回的点击字体顺序
        backToken: '', // 后端返回的token值
        setSize: {
          imgHeight: 0,
          imgWidth: 0,
          barHeight: 0,
          barWidth: 0
        },
        tempPoints: [],
        text: '',
        barAreaColor: undefined,
        barAreaBorderColor: undefined,
        showRefresh: true,
        bindingClick: true
      }
    },
    watch: {
      // type变化则全面刷新
      type: {
        immediate: true,
        handler() {
          this.init()
        }
      },
      imgSize: {
        immediate: true,
        handler: 'resetSize'
      },
      barSize: {
        immediate: true,
        handler: 'resetSize'
      }
    },
    methods: {
      init() {
        // 加载页面
        this.fontPos.splice(0, this.fontPos.length)
        this.checkPosArr.splice(0, this.checkPosArr.length)
        this.num = 1
        this.getPicture()
        this.$nextTick(() => {
          this.setSize = this.resetSize(this) // 重新设置宽度高度
          this.$parent.$emit('ready', this)
        })
      },
      async resetSize() {
        await this.$nextTick()
        this.setSize = resetSize(this.$el, this.imgSize, this.barSize)
      },
      canvasClick(e) {
        this.checkPosArr.push(this.getMousePos(this.$refs.canvas, e))
        if (this.num === this.checkNum) {
          this.num = this.createPoint(this.getMousePos(this.$refs.canvas, e))
          // 按比例转换坐标值
          this.checkPosArr = this.pointTransfrom(this.checkPosArr, this.setSize)
          // 等创建坐标执行完
          setTimeout(() => {
            // var flag = this.comparePos(this.fontPos, this.checkPosArr);
            // 发送后端请求
            const captchaVerification = this.secretKey
              ? aesEncrypt(`${this.backToken}---${JSON.stringify(this.checkPosArr)}`, this.secretKey)
              : `${this.backToken}---${JSON.stringify(this.checkPosArr)}`
            const data = {
              captchaType: this.captchaType,
              pointJson: this.secretKey
                ? aesEncrypt(JSON.stringify(this.checkPosArr), this.secretKey)
                : JSON.stringify(this.checkPosArr),
              token: this.backToken
            }
            reqCheck(data).then(response => {
              const res = response.data.data
              if (res.repCode === '0000') {
                this.barAreaColor = '#4cae4c'
                this.barAreaBorderColor = '#5cb85c'
                this.text = '验证成功'
                this.bindingClick = false
                if (this.mode === 'pop') {
                  setTimeout(() => {
                    this.$parent.clickShow = false
                    this.refresh()
                  }, 1500)
                }
                this.$parent.$emit('success', { captchaVerification })
              } else {
                this.$parent.$emit('error', this)
                this.barAreaColor = '#d9534f'
                this.barAreaBorderColor = '#d9534f'
                this.text = '验证失败'
                setTimeout(() => {
                  this.refresh()
                }, 700)
              }
            })
          }, 400)
        }
        if (this.num < this.checkNum) {
          this.num = this.createPoint(this.getMousePos(this.$refs.canvas, e))
        }
      },

      // 获取坐标
      getMousePos(obj, e) {
        const x = e.offsetX
        const y = e.offsetY
        return { x, y }
      },
      // 创建坐标点
      createPoint(pos) {
        this.tempPoints.push(Object.assign({}, pos))
        return ++this.num
      },
      refresh() {
        this.tempPoints.splice(0, this.tempPoints.length)
        this.barAreaColor = '#000'
        this.barAreaBorderColor = '#ddd'
        this.bindingClick = true
        this.fontPos.splice(0, this.fontPos.length)
        this.checkPosArr.splice(0, this.checkPosArr.length)
        this.num = 1
        this.getPicture()
        this.text = '验证失败'
        this.showRefresh = true
      },

      // 请求背景图片和验证图片
      async getPicture() {
        const data = { captchaType: this.captchaType }
        const response = await reqGet(data)
        const res = response.data.data
        if (res.repCode === '0000') {
          this.pointBackImgBase = res.repData.originalImageBase64
          this.backToken = res.repData.token
          this.secretKey = res.repData.secretKey
          this.poinTextList = res.repData.wordList
          this.text = `请依次点击【${this.poinTextList.join(',')}】`
        } else {
          this.text = res.repMsg
        }
      },
      // 坐标转换函数
      pointTransfrom(pointArr, imgSize) {
        return pointArr.map(p => {
          const x = Math.round((310 * p.x) / parseInt(imgSize.imgWidth))
          const y = Math.round((155 * p.y) / parseInt(imgSize.imgHeight))
          return { x, y }
        })
      }
    }
  }
</script>
